Programs, Annual Conference on Welding to be held at Purdue University under the joint direction of Engineering Extension Department, Department of Practical Mechanics with the School of Chemical Engineering and Manufacturers of Welding Equipment co-operating, December 15 - 17, 1926; December 13 - 15, 1927; , December 11 - 13, 1929

Included here are some of the earliest pamphlets and brochures from the Engineering Extension Service, such as; Engineering Experiment Station, Second Annual Conference of Indiana Foundry Men, Under the Direction of Department of Practical Mechanics, Engineering Extension Service, Purdue University, January 17 – 18, 1924; program, Engineering Experiment Station, Annual Meeting Indiana Public Utility Association, Held at Purdue University, Lafayette, Indiana, January 15 – 16, 1924; program, Engineering Extension Service, Conference of Gas Metermen to be held at Purdue University, under the direction of School of Chemical Engineering in cooperation with Indiana Gas Association, February 23 – 25, 1925; program, Engineering Extension Department, Second Annual Conference for Gas Metermen, to be held at Purdue University under the direction of School of Chemical Engineering in cooperation with Indiana Gas Association, February 17 – 19, 1926; among many others. See the comprehensive listing at the item level.